MESON Chess Problem Database
Problem Display
PID: 81676 (5r2/3p3R/5kpK/2N4R/8/6Qn/B2r4/bb6 w - - 0 1)
Macleod, Norman Alasdair
Mat, 1988
#2
6 + 8
| 6455 | The Chessboard Adventures of Norman Macleod | 1996 |
SOLUTION
- SOUND
- Sets
- 1...Rxa2
- 2.Qd6#
- 1...Rb2
- 2.Sxd7#
- 2.Qe5#
- 2.Qd6#
- 2.Qc3#
- 1...Rc2
- 2.Se4#
- 2.Sxd7#
- 2.Qd6#
- 2.Qxg6#
- 1...Re2
- 2.Sxd7#
- 1...Rf2
- 2.Sxd7#
- 2.Qd6#
- 1...Rg2
- 2.Sxd7#
- 2.Qd6#
- 1...Rh2
- 2.Sxd7#
- 2.Qd6#
- 1...Rd3
- 2.Se4#
- 2.Qxg6#
- 1...Rd4
- 2.Qe5#
- 1...Rd6
- 2.Qxd6#
- 1...Rf7
- 2.Rxf7#
- 1...Ra8
- 2.Rf7#
- 1...Rb8
- 2.Rf7#
- 1...Rc8
- 2.Rf7#
- 1...Rd8
- 2.Rf7#
- 1...Re8
- 2.Rf7#
- 1...Rg8
- 2.Rf7#
- 1...Bd4
- 2.Sxd7#
- 2.Qd6#
- 1...Be5
- 2.Qxe5#
- 1...Bxa2
- 2.Qxg6#
- 1...Bd3
- 2.Sxd7#
- 2.Qd6#
- 1...Be4
- 2.Sxe4#
- 1...Sg1
- 2.Qg5#
- 1...Sf2
- 2.Qg5#
- 1...Sf4
- 2.Qg5#
- 1...Sg5
- 2.Qxg5#
- 1...d5
- 2.Qd6#
- 1...d6
- 2.Sd7#
- 1...Rxa2
- Tries
- 1.Sd3?
- threat
- 2.Qd6#
- 2.Qxg6#
- 1...Rxd3
- 2.Qxg6#
- 1...Bxa2
- 2.Qxg6#
- 1...Bxd3
- 2.Qd6#
- 1...gxh5
- 2.Qg6#
- 1...Rf7
- 2.Rxf7#
- 2.Qd6#
- 1...Sg5
- 2.Qf4#
- 2.Qxg5#
- 1...Re2
- 2.Qxg6#
- 1...Rg2
- 2.Qd6#
- 1...Re8
- 2.Rf7#
- 2.Qxg6#
- 1...Rg8
- 2.Rf7#
- 2.Qd6#
- 1...Be5
- 2.Qxe5#
- 2.Qxg6#
- 1...Sf4
- 2.Qxf4#
- 2.Qg5#
- 1...d6
- 2.Qxd6#
- 2.Qxg6#
- 1...g5!
- threat
- 1.Qf4+?
- 1...Bf5
- 2.Se4#
- 1...Sxf4!
- 1...Bf5
- 1.Qh4+?
- 1...Sg5
- 2.Qxg5#
- 1...g5!
- 1...Sg5
- 1.Qc3+?
- 1...Rd4
- 2.Sxd7#
- 1...Bxc3!
- 1...Rd4
- 1.Sd3?
- Keys
- 1.Qd3!
- threat
- 2.Se4#
- 2.Sxd7#
- 1...Rxa2
- 2.Qd6#
- 1...Rxd3
- 2.Se4#
- 1...Bxa2
- 2.Qxg6#
- 1...Bxd3
- 2.Sxd7#
- 1...gxh5
- 2.Sxd7#
- 1...Rf7
- 2.Rxf7#
- 1...Sg5
- 2.Sxd7#
- 1...g5
- 2.Sxd7#
- 1...Re2
- 2.Sxd7#
- 1...Rd8
- 2.Se4#
- 2.Rf7#
- 1...Re8
- 2.Sxd7#
- 2.Rf7#
- 1...Sf2
- 2.Sxd7#
- 1...d5
- 2.Qa6#
- 1...d6
- 2.Se4#
- 2.Sd7#
- threat
- 1.Qd3!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 3
- ADDED MATES = 4
- REMOVED MATES = 13
- Sets
- R(c);N_GUARD,XB(A)::QAR2(B)
- R(c);N_GUARD::S(C),XP(g)
- R(c);S_CUTB(a)::QAB1(B)
- R(c);N_GUARD::QAR2(B),XR(c)
- R(h);N_GUARD::R1(F),XR(h)
- R(h);N_GUARD::R1(F)
- B(a);N_GUARD::QAB1(B),XB(a)
- B(b);N_GUARD,XB(A)::QAR1(B),XP(f)
- B(b);N_GUARD::S(C),XB(b)
- S(d);N_GUARD::QAB1(B)
- S(d);N_GUARD::QAB1(B),XS(d)
- P(g);S_CUTR(c)::QAR2(B)
- P(g);S_CUTR(c)::S(C)
- Tries
- Try
- S(C);
- Threat
- DUALS(2)
- Vars
- R(c);XS(C)::QAR1(B),XP(f)
- B(b);XB(A)::QAR1(B),XP(f)
- B(b);XS(C)::QAR2(B)
- P(f);XR(D)::QAR1(B)
- R(c);::QAR1(B),XP(f)
- R(c);::QAR2(B)
- Refutation
- P(f);
- Try
- Q(B);CHECK
- Vars
- B(b);P_SPINB(b)::S(C)
- Refutation
- S(d);XQ(B)
- Try
- Q(B);CHECK
- Vars
- S(d);N_GUARD,P_SPINS(d)::QAB1(B),XS(d)
- Refutation
- P(f);P_SPINP(f)
- Try
- Q(B);CHECK
- Vars
- R(c);P_SPINR(c)::S(C),XP(g)
- Refutation
- B(a);XQ(B)
- Try
- Actual
- Q(B);
- Threat
- DUALS(2)
- Vars
- R(c);N_GUARD,XB(A)::QAR2(B)
- R(c);XQ(B)::S(C)
- B(b);N_GUARD,XB(A)::QAR1(B),XP(f)
- B(b);XQ(B)::S(C),XP(g)
- P(f);XR(D)::S(C),XP(g)
- R(h);N_GUARD::R1(F),XR(h)
- S(d);::S(C),XP(g)
- P(f);::S(C),XP(g)
- R(c);::S(C),XP(g)
- P(g);N_GUARD,S_CUTR(c)::QAR(B)
Developed and maintained by Brian Stephenson.
Implemented with HTML5, MySQL, Perl (with, inter alia, CGI::Simple, HTML::Template & XML::LibXML) &
CSS/Javascript (jQuery, Bootstrap & DataTables).